const express = require('express')

const app = express()

// 调用 exprress.static() 方法
app.use(express.static('file'))
app.use(express.static('demo'))

// 挂载路径前缀
app.use('/demo',express.static('demo'))

app.listen(80,()=>{
    console.log("server run at http://127.0.0.1:80");
})